[PATCH] add ppc64 specific code

[Roland McGrath]

> OK I'll take a look at this. On the .hidden the gcc-3.2 may not
> have all support for this. Full support is promised for gcc-3.3.

The .hidden is never mandatory, just optimal, right?  (The exports are
controlled by version scripts anyway.)  So if you use attribute_hidden and
the other glibc macros with existing configure checks, then it will be
suboptimal in gcc 3.2 but better when 3.3 comes along.

> OK, I'll need to do a quick forward port to current cvs first then create
> new patch.

Please do.